volatile char *portC,*portA,*colC,*rowA;
int i;
void setup(){
portC  = 0x27;
portA = 0x21;
colC = 0x28;
rowA = 0x22;
*portC = 0xFF;
*portA = 0xFF;

}

void alphaB(){
  
  *colC = 0;
  *rowA = 255;
  //topmost line
  for(int i=0;i<7;i++){
    *rowA = 254;
    *colC = 1<<i;
  }

  // leftmost line
  for(int j=0;j<7;j++){
    *colC = 0x01;
    *rowA = 255-(1<<j);
  }

//middle line
  for(int l = 0;l<7;l++){
    *rowA = 239;
    *colC = 1<<l;
  }
  
// bottom most line
  for(int k=0;k<7;k++){
    *rowA = 127;
    *colC = 1<<k;

  }
// upper right most three
  *colC = 0;
  *rowA = 255;
for(int m=1;m<4;m++){
*colC = 128;
*rowA = 255 - (1<<m);

}

// two leaving last
for(int n=5;n<7;n++){
  *colC = 128;
  *rowA = 255- (1<<n);
}

}
void loop(){
  
alphaB();

}